/*
 * Copyright (C) 2015 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.pumpkin.ui.widget.carousel;

import android.animation.TimeInterpolator;
import android.view.animation.DecelerateInterpolator;
import android.view.animation.LinearInterpolator;

import androidx.annotation.RestrictTo;
import androidx.annotation.RestrictTo.Scope;
import androidx.interpolator.view.animation.FastOutLinearInInterpolator;
import androidx.interpolator.view.animation.FastOutSlowInInterpolator;
import androidx.interpolator.view.animation.LinearOutSlowInInterpolator;

/**
 * Utility class for animations containing Material interpolators.
 *
 * @hide
 */
@RestrictTo(Scope.LIBRARY_GROUP)
public class AnimationUtils {

    public static final TimeInterpolator LINEAR_INTERPOLATOR = new LinearInterpolator();
    public static final TimeInterpolator FAST_OUT_SLOW_IN_INTERPOLATOR =
            new FastOutSlowInInterpolator();
    public static final TimeInterpolator FAST_OUT_LINEAR_IN_INTERPOLATOR =
            new FastOutLinearInInterpolator();
    public static final TimeInterpolator LINEAR_OUT_SLOW_IN_INTERPOLATOR =
            new LinearOutSlowInInterpolator();
    public static final TimeInterpolator DECELERATE_INTERPOLATOR = new DecelerateInterpolator();

    /**
     * Linear interpolation between {@code startValue} and {@code endValue} by {@code fraction}.
     */
    public static float lerp(float startValue, float endValue, float fraction) {
        return startValue + (fraction * (endValue - startValue));
    }

    /**
     * Linear interpolation between {@code startValue} and {@code endValue} by {@code fraction}.
     */
    public static int lerp(int startValue, int endValue, float fraction) {
        return startValue + Math.round(fraction * (endValue - startValue));
    }

    /**
     * Linear interpolation between {@code outputMin} and {@code outputMax} when {@code value} is
     * between {@code inputMin} and {@code inputMax}.
     *
     * <p>Note that {@code value} will be coerced into {@code inputMin} and {@code inputMax}.This
     * function can handle input and output ranges that span positive and negative numbers.
     */
    public static float lerp(
            float outputMin, float outputMax, float inputMin, float inputMax, float value) {
        if (value <= inputMin) {
            return outputMin;
        }
        if (value >= inputMax) {
            return outputMax;
        }

        return lerp(outputMin, outputMax, (value - inputMin) / (inputMax - inputMin));
    }
}
